Abgaham l



Jan. 1925- I Re. 15,977

A. L. KANAGY ET AL SECTIQNAL FURNACE ROOF Original Filed June 14,1922 2 Sheets-Sheet 1 n f /7 ;e I I fl I l I I I I u I q /6 L I I I l l I l I I I r I 78 2 Sheets-Shet 2 [nyen PM 2 L 1 0 A0 4 EE Me Y m G AU N w Au 1 KWF I1 T mm A H r 0 Reiaeued Jan. '6, 1925.

UNITED- STATES Re. 15,911 (PATENT OFFICE.

mm 1.. macrmn 'waL'rEn n. COTTON, orcmcaeo, ILLmoIs.

SEOTIONA L FURNACE ROOF.

ori inal so. 1440,4014,

Roofs, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to brick furnace roofs, and particularly to that class of furnace used for melting metals, such as the malleable iron and open hearth types.

The invention is also particularly adaptable to boiler arches where the trusses are not exposed to the fire, such as in the Dutch oven type.

The objects of the invention are to pro vide a roof of increased stability relative to collapse; to provide easy means for repairs while the furnace is in operation; to provide simple and inexpensive means forv supporting the fire brick; and to provide easy ineans for reloading with brick.

The invention is illustrated 1n the accompanying drawings, in which Fig. 1 isa si e view of the roof section and setting as usually applied to malleable iron furnaces;

Fig. 2 is a plan;

Fig. 3 is an elevation of three sections showing one in end elevation and two in cross-section on line 33 of Fig. 1;

Fig. 4 is a sideelevation of a modification of a roof section, showing the structure flat instead of bowed;

. Fig. 5 is a plan view of a fragment of the structure shown in Fig. 4;

Fig. 6 is a sectional elevation of two sections on line 6-6 of Fig. 4, one of the sections being shown with a repair brick;

Fig. 7 is a plan viewof a fragment of the truss showing brick supporting ledges and one method of inserting brickan Fig. 8, is a perspective view of the brick.

In the drawing numeral 10 generally des-. ignates a truss which consists of two beams 11 and 12, of sufficient length to s an the side walls 13 of the furnace. Lo 14 and 15, extending inwardly from the ams 11 and 12, and spacing embers 16 are permanentl secured to e beam 12, as by nvete 1 and arefremovably secured to quickly closed by repair b Ema January 2, 1923. Serial No. 568,248, filed June 14, 1922. a lication-11- reinne filed February 15, 1924. Serial No. 693,144.

beam 11, as by cap screws 18. These spacing members hold the truss beams in parallel relation and are each provided with an eyeso as to facilitate the withdrawal from the roof of a section by means of a crane, as is the usual practice in charging metal treating furnaces.

The brick 19 (Fig.8) in sections of the bowed or springtype of roof are made slightly tapered on the side, as 20, 21, to conform to the curvature of the roof, while in the flat roof the sides are parallel. The top of each brick is of dove-tail configuration, the sockets '22 and 23 beingcomplementary in form to the ledges 14, 15, of the beams 11 ,and 12, which are so s aced that the dove-tailed ends of the bric may be slid into place, the ledges loosely fitting the sockets 22 and 23.

The bricks may be placed in the truss by inserting the dove-tailed head through a passage on each end, as shown by dotted. lines in Fig. 7, and sliding into the ledges to the desired osition, or y the spreading of the beams y loosening the ca screws which hold the beams rigidly to t e spacing members. In practice, the latter method is usuall em 10 ed, and when 'it is desired to p ace t e ricks in ition the truss, is turned u side down an the beams are separated su ciently to permitthe in-. sertion of the'supportin head but not the body portion of the bric The bricks are laid m position with suitable fire cla mortar or grout between the same and e beams are adjusted until the ledges engage the dovetail he'ad leaving a slight clearance to compensate for expansion ofthe bricks. By this arrangement, the life of the brlcks is prolonged in that they are not likelyl become cracked or broken incident to t expansion since they are free to expand inall directions. I

It is desirable that the brick at each endof eachisection rest upon the side walls of Y the furnace so there may be as little resistance tothe expansion of the the heat, as possible. In Fig. 4 the end'bricks 24 sit in a recess atthel top of the side walls 13. Thelpockets 25 between the extension of the side walls and brick may be filled with fire clay to insure a perfect seal. r j

Should any brick fall the cav1tymay be brick, due to shown in one of the sections of Fig. 6, orby sl'iding'the adjacent brick to close the cavity and inserting a new one at the end for the abutment.

We claim as our invention I 1. In a furnace roof, in combination a plurality of sections each consisting of a pair of beams having projecting ledges, a

a plurality of bricks having projections com- 7 tion, a truss consistin relation, a ledge projeetin of the beams for-the purpose set forth.

plementary to and restin on said ledges, and means for adjustably olding the beams in parallel relation.

2. In a sectional furnace roof, in combination, a truss consisting of a pair of beams each having an inwardly projectin ledge,

spacing bars, means for securing sai beams r V and bars together, with said beams in allel relation, such means associated with parone of the beams being removable, and a plurality of bricks suspended from the,

edges. 7

3. In a sectional jfurnace roof, a section consistin of a pair of beams, meansfor adjustabFy securing said beams in parallel inwardly from each of the beams. a plu ty of bricks suspended from the ledges, the end brick being adapted to sit upon the side walls of-"the furnace and forming an abutment at each end for the entire section to'rest upon.

4. The combination in a sectional furnace roof, of a pair of beams, a plurality of bricks having dove-tailed engagement with the beams,

means including a plurality of splac'ing bars for holding the beams in ara el relation, andfor permitting spreading 5. In a sectional furnace roof, in combinaof a pair of beams spaced apart and he] inparallel relation,

v brick holding ledges on the beams, a plurality of bricks, and means for permitting connecting said beams together.

qecting led placing the brick inproper position on the edges.

6. The combination in a sectional furnace roof, ofa pair of parallel beams, a plurality of bricks having dove-tailed engagement with the beams and means for adjustably 7. The combination in a sectional furnace roof, of a pair of beams each having an inwardly projecting ledge terminating short of the ends of the beams, and a plurality of bricks having projections complementary to and adapted to be slid into position upon said ledges.

.8. In a sectional. furnace roof, a section consisting of a pair of parallel beams each I having an inwardly projecting ledge, the ledges terminating short of the ends of the alns, and a plurality of bricks suspended from the ledges. I

9. In a furnace roof, 'in combination, a

pair of beams each having an inwardly proa re air brick comprising two vertical ha ves eac half having a projection complementary to and adapted to rest upon one of said ledges, and a vertical key adapted to fit between said halves.

10. In a sectional furnace roof, in combination, a truss havin a. pair of brick suspen din ledges exten ing substantially the 1 entire en h of the'truss andmeans where by the "l ges may be moved to and from each other. 11. In a furnace roof, a truss member provided with ledges, a plurality of bricks aving interlocking connection with said ledges, meansfor holding said ledges in spaced relation, includ' screw-threaded members for engaging 'said truss for permitting the spreadm of said ledges.

ABR L. KANAGY. WALTER H. COTTON. 

